Cone disc antenna by Mike Harwood

thingiverse

For NONCOMMERCIAL use ONLY. Please accept. Update: New notes on making the cone assembly If You can not get copper made sheet metal - pls stay away from aluminium made Coca Cola can and alike tin works (German: Zinn, Weissblech) This thing is the Cone disc antenna courtesy of Mike Harwood https://sdrplayusers.net/forums/topic/3d-print-discone-antenna/ Permission explicitly granted by the original creator. Thx mike. For using on ABS-B (1090 MHz) scale down the size of the parts. Scale down to app. 50 percent. For the antenna stuff, esp the calculation read the attached documents, there is a lot. Some templates included. Grabbed from websites of kindly poeple, providing all the stuff for free. related links/sources: -Discone Antenne for GSM 3G 4G https://mictronics.de/posts/Discone-Antenna/ -cone template (same see the DL files) micronics.de/img/2015/07/Discone_800-2100MHz_Unwinding.pdf Andrew McNeil -discone antenna youtube.com/ watch?v=IaFSX7ycj0I -dual cone antenne youtube.com/ watch?v=k0OW-lPXSqs -cone template 2,4 GHz (same see the DL files) https://drive.google.com/file/d/0BzmJxxD-Z4B6bzBfZFM4VmQyTXM/ -VE3SQB Antennnen Design https://www.ve3sqb.com/ https://www.ve3sqb.com/discone2002.exe Read the notes. -For those hwo want to learn theory of antennas online. Just in time: Karen Rucker online class (HAD channel) youtube.com/playlist ?list=PL_tws4AXg7authztKFg5ZN5qWGtq3N_nI ..................................... Mikes notes: 2019 The project involved both the 3D printer and radio… – a discone antenna for use between 400MHz and, hopefully, 2GHz. The cone’s diameter and slant height are both 18cm and the disc diameter is 12.6cm. The disc and cone are 3D printed (there are several papers supporting use of the filament at these frequencies) and covered with thick conducting-adhesive copper foil. This is the same foil used to surround sensitive pick-ups in electric guitars to reduce hum. A simple 20cm diameter, 20cm high radome provides environmental protection. Apart from the 3D printed structures and foil, the only other parts are one SO239 socket, 25cm of 50 Ohm coax, an M8 bolt with washers and nuts, and five self-tapping screws. 2021 /p1 about the holes - one is for the screw and the other is to feed through the wire to the disc. Actually, I did solder to the copper foil. I am sure that it is possible to avoid this, but I have soldered to this foil many times when it is covering PLA, and if you are fairly quick then any bad effects are negligible. See the drawing I have put here. It shows where to feed the inner wire and the braid from the inside of the cone to the foil wrapped around the cone and the disc. 2021 /p2 I actually covered both sides of the disc with metal foil. I’m not sure that was wise with hindsight because the disk should be of minimal thickness, but that is what I did several years ago. I screwed the disc to the cone with a metal screw (and a) nylon insulating washer between the two. I inserted a solder tag between the washer and disc and made one soldered connection to the solder tag. The other connection was soldered to the top of the cone. ..................................... Hint: -The disc can be made from pcb copper clad. The glas fiber substrate makes a perfectly working insulator. - Important: The disc and the cone foil MUST NOT be shorted electrically. For mounting the disc to the cone use a nonconductive screw i.e. made from Nylon. ...............................................................................................................